Designer backpacks are usually pretty expensive and not even that unique. Let me show you how you can create your own custom backpack with only few minutes of creative power of your mind and help from 3Dsimo device.
First, we need to find backpack which is made out of leather or similar material and an idea of what you want to create.

I started by using burning attachment set to 410°C, continuous mode on, drawing symmetrical central motive and progressed outward. Different tip shapes helped me create different imprints. Round tip for circular shapes, knife tip for narrow straight stripes and pointy tip hor details.

Next, mounting 3D attachment and drawing on the leather directly, using any filament of any color (red ABS in my case) and removing the filament when it has cooled off, I was able to create lighter stripes and shapes, which offered me wider possibilities and creative boost.